Charging base for a cordless telephone



FIG. 1 is a front and upper left perspective view of a charging base for a cordless telephone showing our new design;

FIG. 2 is a right side elevational view;

FIG. 3 is a rear elevational view; and,

FIG. 4 is a bottom plan view thereof.

The broken lines shown throughout the views are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a charging base for a cordless telephone, as shown and described. 